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PUBLIC 11EALTH SERVTCES PpU!N �. .o SAN JOAQUIN COUNTY RMC LONESTAR 30350 S TRAWYMWNMENTAL HEALTH DIVISION TRACY Erfi&t M. Fujimoto, M. D., M.P.H., Acting Health Officer 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, CA 95201-0388 °gr;FORa`P On January 23 , 1996, I A**fit RMC Lonestar located at 30350 S. Tracy Blvd. in the unincorporated area south of the city of Tracy. My presence was requested by RMC Lonestar representatives inorder to witness the removal of a 10, 000 gallon diesel tank, a 1, 000 gallon gasoline tank and a 500 gallon waste oil tank. In attendance were two firefighters from Tracy Rural Fire Department, Chris Rowley of Chromolab, and Yalew Kabede of Sacramento County Environmental Management . Bradd Stately of RMC Lonestar and Joe Medina of Pacific Excavators were conducting the removal . Jim Reese of H and H Environmental would monitor the combustible gas indicator and transport the tanks from the site . I arrived at the site of the 1, 000 gallon gasoline tank and found that the overburden had been removed from the tank. During the excavation of the tank an electrical conduit was unearthed that crossed over the tank. Inorder to remove the tank without damaging the conduit Pacific Excavatorson lanned excavating one end of P g the tank and sliding the tank from under the conduit . While doing the additional digging of the hole a second tank was found. I informed Mr. Stately, that this discovered tank would probably require the payment of the state surcharges and additional removal permit fees . He agreed and requested an appointment for removal of these tanks for the following day. We then moved to the location of the 10, 000 gallon diesel tank. I saw two individuals working near the tank. It was learned that one of the individuals was the brother-in-law of the contractor. Mr. Stately assisted the contractor with securing the chains to the tank. Mr. Reese took combustible gas readings, 1% of LEL and 18 % Oxygen. The tank showed signs of corrosion and heavy staining around the fill area which was located at the east end of the hole . The tank pit had a slight odor near the east end. Prior to the removal, an underground water line was damaged during the excavation of the tank which left the area extremely muddy. Samples were taken from the bucket at a depth of 14 feet near the ends of the tank. This tank was labeled with paint on each end as 39-1737-2 . The 560 waste oil tank had staining around the fill . The fill pipe was damaged and I was unable to determine when this damage occurred. The LEL was 2% and the oxygen registered 13% . There was contamination in the form of a gray layer to the depth of 5 feet with a very heavy odor from the hole . Samples were taken from the bottom and the east sidewall of the excavation. This tank was labeled with paint on each end as 39-1737-3 . The manifest for the two tanks as 95590444 and manifested to H & H. A Division of San Joaquin County Health Care Services